Greetings alice and welcome on SoM,
First, make sure to read these three articles which will help you get familiar with the site
SoM survival guide
Getting started on SoM
If you are new on the topic of magic, I suggest that you learn the basics first and then work your way onward.
My advise is to visit the forums, read the articles and get to know the rest of the members on the Chatter.
Have fun learning and enjoy your stay here.